<template>
	<view>
		<view class="search-box">
			<uni-search-bar @input="input" :radius="100" cancelButton="none" placeholder="请输入搜索内容"></uni-search-bar>
		</view>
	</view>
	<!-- 搜索建议列表 -->
	<view class="sugg-list" v-if="searchResults.length !== 0">
		<view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
			<view class="goods-name">
				{{item.goods_name}}
			</view>
			<uni-icons type="arrowright" size="16"></uni-icons>
		</view>
	</view>
	<view class="history-box" v-else>
		<view class="history-title">
			<text>搜索历史</text>
			<uni-icons type="trash" size="17" @click="clean"></uni-icons>
		</view>
		<view class="history-list">
			<uni-tag :text="item" v-for="(item,i) in histories" :key="i" @click="gotoGoodsList(item)"></uni-tag>
		</view>
	</view>
</template>

<script>
	export default {
		onLoad() {
			this.historyList = JSON.parse(uni.getStorageSync('kw')|| '[]')
		},
		data() {
			return {
				timer:null,
				kw:'',
				searchResults:[],
				historyList:[]
			};
		},
		computed:{
			histories(){
				return [...this.historyList].reverse()
			}
		},
		methods:{
			input(e){
				//input输入事件的处理函数
				//e.value形参获取用户输入的内容
				//防抖处理
				clearTimeout(this.timer)
				this.timer = setTimeout(()=>{
					this.kw=e
					this.getSearchList()
				},500)
			},
			async getSearchList(){
				if(this.kw.length === 0) {
					this.searchResults = []
					return
				}
				const {data:res}=await uni.$http.get('/api/public/v1/goods/qsearch',{query : this.kw})
				if(res.meta.status !== 200) return uni.$showMsg()
				this.searchResults = res.message
				if(this.historyList.includes(this.kw)){
					this.historyList=this.historyList.filter((item)=>{
						return item!==this.kw
					})
					this.saveSearchHistory()
				}
				else{
				this.saveSearchHistory()
				}
			},
			gotoDetail(item){
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
				})
			},
			saveSearchHistory(){
				this.historyList.push(this.kw)
				//持久化存储
				uni.setStorageSync('kw',JSON.stringify(this.historyList))
			},
			clean(){
				this.historyList = []
				uni.setStorageSync('kw','[]')
			},
			gotoGoodsList(kw){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?query='+kw
				})
			}
		}
	}
</script>

<style lang="scss">
.search-box{
	position: sticky;
	top: 0%;
	z-index: 999;
}
.sugg-list{
	padding-left: 5px;
	padding-right: 5px;
	.sugg-item {
		font-size: 12px;
		padding: 13px 0;
		border-bottom:1px solid #efefef;
		display:flex;
		align-item:center;
		justify-content: space-between;
		.goods-name {
			// 文字不允许换行、
			white-space: nowrap;
			//溢出部分隐藏
			overflow: hidden;
			//文字溢出后，使用...替代
			text-overflow:ellipsis;
			margin-right: 3px;
		}
	}
}
.history-box{
	padding-left:5px;
	padding-right: 5px;
	.history-title{
		display: flex;
		justify-content: space-between;
		height: 40px;
		align-items: center;
		font-size: 13px;
		border-bottom: 1px solid #efefef;
	}
	.history-list{
		display: flex;
		flex-wrap: wrap;
		.uni-tag{
			margin-top: 5px;
			margin-right: 5px;
		}
	}
}
</style>
